Barry Bonds' 715th home run ball - $220,100

Original Hollywood sign - $450,400

The Hollywood sign.
David McNew/Getty Images

In 2005, the original Hollywood sign (the one that said Hollywoodland) was sold on eBay for a little over $450,000. According to reports, a nightclub named Hank Berger bought the sign from the Hollywood Chamber of Commerce for around $10,000. Berger then sold it to memorabilia collector Dan Bliss in 2003 for an undisclosed "six-figure sum," who then put it up for auction for $300,000.

Honus Wagner cigarette card - $1.1 million

This very rare card was issued in 1909 in a pack of cigarettes, and sold in 2000 for $1.1 million plus 15% buyer's fee, which came out to around $1.27 million. It was the most expensive auction that year, and the most paid for a baseball card at the time.

The card was a promotional item for a cigarette company, but it was pulled from circulation when Wagner objected to the use of his image without permission.

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Albert Einstein's "God letter" - $3 million

The letter, which was written shortly before Einstein's death, was sent to Jewish philosopher Erik Gutkind. The letter included Einstein's views that God did not exist. It was sold to an anonymous bidder — there were only two bidders altogether — and included the envelope, stamp, and postmark.

The letter was purchased by the anonymous seller for $404,000 in 2008.

Crypt above Marilyn Monroe's - $4.6 million

In 2009, a woman named Elsie Poncher sold her husband's crypt in Pierce Brothers Westwood Village Memorial Park cemetery to help pay for her Beverly Hills home. The main selling point: the crypt is located above Marilyn Monroe's.